ABSTRACT Based on the fractal nature of pore size in sandstone and grindingbody within a certain range and the Andreasen equation in theory, using the optimization theory of traditional tem- porary plugging agent for reference, we established a new temporary plugging method for reservoir protection. This new method emphasizes on the formulation and optimization of solid filling particles and softening particles. It is good in easy operation and strong applicability. Indoor experiments with the natural core from Hailaer area were conducted using this new method. Compared with traditional methods, the filtration reduced significantly and the permeability recovery was improved greatly, which verified the rationality of this new method.
Cite this paper
Sun, Y. , Qin, Y. and Li, Q. (2011) A new method of temporary plugging based on andreasen equation. Natural Science, 3, 120-123. doi: 10.4236/ns.2011.32017.
 Luo, X.D. and Luo, P.Y. (1992) Application and research of temporary plugging technology in reservoir protection. Drilling Fluid & Completion Fluid, 9(2), 19-27.
 Huang, B.Z. (2007) Microscopic mechanisms and model design of close packing theory. Petroleum Drilling Techniques, 35(1), 5-12.
 Cai, J.H., Wu, X.M. and Sui, G. (2009) Research on en- vironmentally safe temporarily plugging drilling fluid in water well drilling. Asia Pacific Health, Safety, Security and Environment Conference, Jakarta.
 Jiang, G.C., Ji, C.F. and Ma, X.P. (2009) Study and ap- plication of reservoir protection fluid system for drilling & completion using oil-film method. 8th European Forma- tion Damage Conference, Scheveningen, The Netherlands.
 Jiang, G.C., Huang L.J. and Zhang G.R. (2006) New technology of unconsolidated sandstone reservoir pro- tection. Publishing House of China University of Petroleum, Dongying.
 Zhang, J.B., Yan, J.N. and Zhao, H,Y. (2004) Opti- mization of bridging particle size distribution of drilling fluid for formation protection. Drilling Fluid & Complet- ion Fluid, 21, 4-7.
 Zeng, F. and Hu, Y. (1995) Particle technology of mineral processing. China University of Mining and Technology Press.
 Tang, M., Pan, J. and Ba, H. (2005) The model of the cementing matrix powder group fractal geometry denseness effect. Journal of Shenyang Jianzhu Univer- sity (Natural Science), 21.